MC908AB32CFUE Datasheet, PDF (187/392 Pages) Freescale Semiconductor, Inc – Microcontrollers

Timer Interface Module A (TIMA)
Address: $0023
Bit 7
6
5
4
3
2
1
Bit 0
Read: Bit 7
6
5
4
3
2
1
Bit 0
Write:
Reset: 0
0
0
0
0
0
0
0
= Unimplemented
Figure 11-6. TIMA Counter Register Low (TACNTL)
11.10.3 TIMA Counter Modulo Registers
The read/write TIMA modulo registers contain the modulo value for the
TIMA counter. When the TIMA counter reaches the modulo value, the
overflow flag (TOF) becomes set, and the TIMA counter resumes
counting from $0000 at the next clock. Writing to the high byte
(TAMODH) inhibits the TOF bit and overflow interrupts until the low byte
(TAMODL) is written. Reset sets the TIMA counter modulo registers.
Address: $0024
Bit 7
6
5
4
3
2
Read:
Bit 15
14
13
12
11
10
Write:
1
Bit 0
9
Bit 8
Reset: 1
1
1
1
1
1
1
1
Figure 11-7. TIMA Counter Modulo Register High (TAMODH)
Address: $0025
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Bit 7
6
5
4
3
2
1
Bit 0
Write:
Reset: 1
1
1
1
1
1
1
1
Figure 11-8. TIMA Counter Modulo Register Low (TAMODL)
NOTE: Reset the TIMA counter before writing to the TIMA counter modulo
registers.
MC68HC908AB32 — Rev. 1.1
Freescale Semiconductor
Timer Interface Module A (TIMA)
Technical Data
187